Upgrade or restore your vehicle's suspension performance with the Bilstein B3 Series OE Replacement Rear Coil Spring. Designed specifically for the Mercedes-Benz M-Class (W164) without Airmatic, this high-quality coil spring ensures consistent ride height and original handling characteristics. Manufactured using high-end chrome vanadium or chrome silicone steel for superior resistance to breakage. Attributes: Constant wire diameter, OE quality fitment. Item includes: 1x Rear Coil Spring (Article: 36-201853). It is recommended to replace springs in pairs for balanced axle performance.